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Showing results for tags 'theropod'.
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From the album: Hell Creek / Lance Formations
Interesting blue color near the base, and some feeding wear at the tip of this immature Tyrannosaurid tooth.-
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I recently found on the site cults3d a very beautiful and almost complete skeleton of Microraptor gui to print with a 3D resin printer. Here is the link: https://cults3d.com/fr/mod%C3%A8le-3d/art/microraptor-gui-skeleton The only problem was the skull was missing. The creator of this specimen, Florent Germain, had not had time to finalize his skull. He'll put it later, when finished, he said. I was able to print this model and I decided to make the skull myself Lucky me, I was able to use a dental scanner (not too suitable for this kind of models) and to generate a 3d printable file . The STL file of the skull is available for free. I am not a pro of 3D modeling software so be indulgent with the result. This file can be modified or improved for the person who can. Here the link : https://cults3d.com/fr/modèle-3d/divers/microraptor-gui-dinosaur-skull-open-source I haven't tried to print it on a printer, but it should work. Enjoy ! Some photos of the skull and skeleton, I'll update this topic when everything will be finished.
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Even though I like and support the development of portraying dinosaurs as real animals instead of monsters, it is hard to deny that an encounter with a big theropod must have been a pretty scary experience.
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Hello, Another microfossil from Wealden. This is very small, 3mm. Now, it's recurved and looks theropod, but it is notable different than the typical small Nuthetes/raptor type teeth we get from there. It also looks different than croc teeth. It is small, 3mm with the tip missing. The base is largely encased in the matrix, but the little bit that is is exposed suggests it to be slightly oval in shape rather than round. There are no visible serrations. If anyone has any thoughts, that would be great, I plan to take it to a dinosaur museum I will visit soon for a look too.
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Small claw from the Kem Kem? possible croc, turtle or small theropod?
msantix posted a topic in Fossil ID
Hi, I know claws from the Kem Kem are very hard to identify since not much is published on them, but this is a small 2.1cm claw from the Kem Kem with a curved shape that makes me think that it might be enough to determine if it is theropod (as listed) or croc or even turtle. My gut tells me it is likely to be croc or turtle, but I think some members here might have claws just like this in their collection, so thought it would be worth asking.
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New controversial study shows how theropods were "smarter" than primates
Pliosaur posted a topic in Fossil News
Although the research regarding this was only published this month, there has been a lot of intense speculation and controversy as to whether theropods especially Tyrannosaurus Rex were comparable to being "primates" of their time. "According to her findings, theropods had as many neurons in their brains as monkeys do today, with the T-Rex boasting "baboon-like" numbers of up to 3 billion neurons. That's a pretty scary level of intelligence for a killing machine the size of a house.With that many neurons, a T-Rex wouldn't have just possessed uncanny cognition. It also might have lived longer, up to 40 years, Herculano-Houzel estimates. That's enough time and smarts to potentially be a social creature with its own culture, like primates and whales, and also suggests they may have worked together, too." Some great sources and videos, feel free let me know your thoughts on this below! The actual study can be found online and reported in the Journal of Comparative Neurology https://www.science.org/content/article/some-dinos-may-have-been-brainy-modern-primates-controversial-study-argues https://phys.org/news/2023-01-phylogenetic-bracketing-dinosaurs-neuron-density.html https://www.sciencealert.com/t-rex-was-a-lot-brainier-than-we-thought-researcher-claims-
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Hey all, Curious to know your thoughts on this tooth. The low CHR is tough... CH: about 13mm adding 1mm for worn tip CBL: 8.5mm CBW: 4.0mm Mesial serration density: 5/mm Distal serration density: 4/mm
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This is a pretty quick drawing to test out my new ipad. It is supposed to be an abelisaurid theropod enjoying a fresh kill. I roughly based the head on the skull of Rugops primus.
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Is this a real complete Dromaeosaurus
Fissiletag posted a topic in Is It Real? How to Recognize Fossil Fabrications
I recently saw a listing of a complete Dromaesaurus or some other Dromaesaurid. It is extremely complete, and I've never seen something like it for sale. Is it real?
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Is this a genuine deltadromeus tooth? Mesozoic Era Late Cretaceous Period ▓Albian ~ Cenomanian Morocco Sahara Kem Kem Basin Size about 60mm If anyone knows, please let me know. Thank you so much to everyone on the forums.
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Hey all, Curious to know your thoughts on this tooth from the JRf in Hill county, Montana. I'm thinking tyrannosaurid, but not aware of tyrannos having things like DSDI=1.5 (granted, neither does Dromaeosaurus) or serrations that get 50% denser towards the middle vs at the base. Judith River formation, Hill county, Montana CH: 13.5mm CBL: 6.5mm CBW: 3mm Mesial serration density: 5/mm Distal serration density: 3.3/mm Serration density greater near the tip and base.
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Any thoughts on this tooth from the Two Medicine formation in Teton co, Montana? CH: 19mm CBL: 10mm CBW: 4mm Mesial serration density: about 4.5/mm Distal serration density: about 4.5/mm Apical hook on the few unworn distal denticles.
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Hey all, This looks Dromaeosaurus to me, but we'll have to see if it's even possible to make that call without any posterior serrations. But the dramatic mesial twist that happens close to the tip and the general morphology give me hope. Also, curious to know what your take is on the posterior edge. The posterior serrations seem to have been sliced off. The serration-like indentations inside the slice itself look a little like they might come from the serrations of another individual's tooth (i.e., face biting or something similar). This tooth got seriously used! JRf, Hill co, Montana CH: 12mm CBL: 6mm CBW: 3mm Mesial serration density: about 4/mm Distal serration density: POSSIBLY similar, based on what might be traces
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Hey all, With the denticles being so worn off this one, I'm wondering if general morphology can confidently ID Dromaeosaurus. It's a tooth I'd normally assume is anterior, but, if it is Dromaeosaurus, I'm not sure I'd be able to tell. Judith River formation, North Central Montana CH: 12mm CBL: 5.5mm CBW: 3mm Mesial serration density: about 6?/mm Distal serration density: about 5.5/mm
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Here are a few photos of my entire collection spread out in my living room between 3 seperate tables and separated by groups; Table #1 Crocodilians, Theropod Dinosaurs, Marine Mammals and Marine Reptiles. Table #2 77 Different Shark Teeth Species. Table #3 Amphibians and Reptiles, Miscellaneous Fossils and Fish.
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From the album: Hell Creek / Lance Formations
Pectinodon (meaning "comb-tooth") is a tooth taxon, since no remains attributable to the genus beyond teeth have been found. Pectinodon seems to be a rare member of the Hell Creek fauna, with their teeth being fairly uncommon (though being so small, I'd guess that few people actively search for them). It was a small Troodontid theropod, with teeth that couldn't handle stresses as well as their Dromaeosaurid and Tyrannosaurid cousins (Torices et al. (2018)). This coupled with their small size suggest that Pectinodon was a small/soft prey specialist, preferring the rodent-sized mammals of the time, lizards, insects, etc. Some researchers have proposed omnivory as a possibility for Troodontids (cf. Holtz et al. (1998)). Troodontids famously are regarded as among the most intelligent dinosaurs for their large brain size / body size ratio. This notion serves as fodder for speculation that had the dinosaurs not gone extinct, Troodontids (Pectinodon being (one of?) the last) would have continued to grow in intelligence and develop sentience and civilizations. Troodontid teeth like Pectinodon can be easily identified by their small size, exaggerated, triangular, apically oriented posterior serrations.-
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From the album: Dinosaurs
A theropod tooth I recently acquired from the JRF. Sold as a juvenile Tyrannosaurid, but I'm not fully convinced. -
@Troodon I suppose this is the one-decade-later version of the same tooth I posted earlier? Hell Creek formation, Garfield co, Montana CH: 12.7mm CBL: 7.2mm CBW: 3.5mm Mesial serration density: 8/mm Distal serration density: about 4/mm Thanks!
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This reminds me of those specialized Acheroraptor premax 2 teeth (for preening?). I'm never seen one for Saurornithelestes, but I suspect that's what this is. I don't know if Dromaeosaurus has anything like this. Judith River formation, Hill co, Montana CH: 7.3mm (I added 0.3mm for tip wear) CBL: 4.8mm CBW: 2.3mm Mesial serration density: 4.8/mm Distal serration density: about 9.5/mm
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Hey all, What do you think of this one? Hell Creek formation, Powder River co, Montana CH: 10.9mm CBL: 6.6mm CBW: 2.9mm Mesial serration density: about 4.8/mm Distal serration density: about 4.0/mm Distal serrations are pretty worn except those near the tip, which look fairly chisel, but have an apical hook(?) Thanks!
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These teeth were sold as a baby tyrannosaurid and a dromaeosaurid/bird respectively. Some other specimens from this lot have been posted here if I recall. But they are from North of Havre, Montana close to the Canadian border. Apparently they are from quite an old collection from around 1950-70s. The provenance should place it solidly in Judith River Formation. Since these teeth were selling somewhat quickly, I just grabbed them and decided on figuring it out later. The first tyrannosaurid tooth does have some similarities to Dromaeosaurus with the mesial twist, but I could be wrong. The second tooth is a bit more confusing. I'm guessing it is Zapsalis-type with those striations which would make it Saurornitholestes. I don't think it's bird compared to bird teeth from other deposits. It's probably not one of those Campanian microraptorians either, and it's probably too big even at this size to be bird or micro. 1st tooth: Length=6.3mm; Distal Density=17.5/3mm; CBL=2.9mm; CBW=1.8mm 2nd tooth: Length=5.8mm; Distal Density= ±11-12/mm (?); CBL=2.6mm; CBW=1.3mm Serration density for the 2nd tooth might not be too accurate since it was extremely difficult to even get to that number. Not sure how to go about getting CH, but it's probably a little bit more than the length since the tips are worn. 1st tooth might be good as is since with that small root section, that probably makes up for what would be a longer crown. 1st Tooth 2nd tooth
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From the album: Triassic
From the "dawn" of the Dinosaurs, this small tooth represents an early theropod. Unlike the other serrated archosauriform teeth present in the formation, this tooth is ziphodont - thin and labio-lingually compresed - the archetypical tooth form that most theropods adhered to since their beginnings.-
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Is this a authentic spinosaurus vertebrae? Found in Kem Kem formation Morocco
prehistoricpeasant posted a topic in Is It Real? How to Recognize Fossil Fabrications
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So I've got this theropod indet tooth that's from the elrhaz formation, or so the seller claims anyway. The tip is missing and I'm wondering if it's due to feeding wear or erosion? The tooth seems to have been quite worn by the owner, the distal carinae is almost worn away, but i suspect it's also eroded some. The angle of the break makes me think it's feeding wear, but il not certain. Any help is appreciated! @Troodon @pachy-pleuro-whatnot-odon
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Hello, Any thoughts on what animal this bone comes from? Judith River Formation, North of Havre, MT close to the Canadian border About 1" long Thanks,
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